Finding the Fourth Proportional to 102,820.05, 141,894.77 and 57,499.94

Step by Step Solution

1. Step 1: Write the proportion equation
   102,820.05 : 141,894.77 = 57,499.94 : x
2. Step 2: Convert to fraction form
   102,820.05/141,894.77 = 57,499.94/x
3. Step 3: Cross multiply
   102,820.05x = 141,894.77 × 57,499.94
4. Step 4: Simplify right side
   102,820.05x = 8,158,940,761.31
5. Step 5: Solve for x
   x = 8,158,940,761.31/102,820.05
6. Step 6: Final answer
   x = 79,351.65